bump(sys-apps/baselayout): bump w/ kvm group fix
hack(app-crypt/trousers): Don't add tss user/group

Calling enewuser/enewgroup can fail in the SDK at the moment because
/etc/passwd and /etc/group might not exist. We don't need trousers
either but finally removing it as a build dependency is more work, do
that later. For now just kill the user/group.
Merge branch 'master' of github.com/coreos/coreos-overlay into baselayout